It is not against the law for a "few" people to call his work and leave messages for him to contact you.. like 8 or 10.
It usually creates an urge to get the telephone calls to cease, when his employer steps in and suggests he take care of the callers' concerns.
If the "concerns" are not addressed, the polite calls keep coming in...... until the employer suggests he go elsewhere to work. Then it starts over...
What was the guys name and number again?